Filter words are quietly distancing your reader
Open any workshop draft and you will find them everywhere: she saw, she heard, she felt, she noticed, she realized. These are filter words, verbs of perception that sit between the reader and the character's experience. They report sensation instead of delivering it. In close third person or first person, that report is a wall you did not mean to build.
The mechanism is simple. Close narration promises the reader direct access to one consciousness. When you write "she felt the cold seep through her coat," you have inserted a narrator who is telling us that the character felt something, rather than letting us feel it alongside her. The sentence has two layers where it needs one. Strip the filter and it collapses into the sensation itself: "the cold seeped through her coat." Same information, one less layer of remove.
This is not a grammar rule. It is a question of proximity. Every filter word is a small reminder that you are reading a report of an experience, written by someone standing slightly outside it. Do that once and nobody notices. Do it on every page and the prose reads as narrated rather than lived, and readers who cannot say why a scene feels flat are usually reacting to exactly this.
The pattern, side by side
Here is the pattern across a few common constructions:
Filtered: She saw the door swing open.
Direct: The door swung open.
Filtered: He heard footsteps on the stairs.
Direct: Footsteps on the stairs.
Filtered: She felt a wave of relief wash over her.
Direct: Relief washed over her.
Filtered: He noticed that her hands were shaking.
Direct: Her hands were shaking.
Filtered: I realized I had left the door unlocked.
Direct: The door. I had left it unlocked.Read each pair aloud. The direct version is not just shorter, it is closer. The reader experiences the door swinging, not a character's report that a door swung. That is the whole trade: fewer words standing between the page and the moment.
When the filter earns its place
None of this means the words are banned. "She saw" earns its place when seeing is the point, when you need to establish that the character is the one perceiving something the reader has not yet been told, or when a beat of conscious noticing matters to the story: a detective clocking a detail, a character catching herself in a lie. The failure is not the word, it is the reflex. Writers reach for "she felt" the way they reach for "said," out of habit, in scenes where the filter adds nothing and the direct statement would carry the same weight with more force.
There is also a register question. Omniscient narration and distant third do not need this fix nearly as urgently, and neither does most nonfiction, because the narrator's presence is already part of the deal in those modes. The tighter your point of view, the more a filter word costs you. If you are writing deep first person and still routing every sensation through "I felt" and "I noticed," you have built a narrator who keeps interrupting the character to confirm she is paying attention.
Catching it without stalling the draft
The practical problem is that you will not catch these while drafting, and you should not try. Stopping mid-scene to interrogate every "she saw" breaks the momentum that got the scene written in the first place, and first-draft momentum is worth more than first-draft cleanliness. Notice the pattern, mark it, keep moving.
That is where a light flag beats a full stop. In Chaptered, leaving a margin comment on a sentence takes a few seconds: select the line and note "filter, cut in revision," then get back to the scene. The comment stays anchored to that exact selection, so when you come back for a dedicated revision pass you are not rereading the whole chapter hunting for the moments you already flagged. You are working through a list instead.
Revision is where this work belongs anyway. Once a scene exists, read every filtered sentence as a question: is the narrator's act of perceiving doing something here, or is it padding between the reader and the moment you actually want them in? Cut the ones that fail that test. Keep the ones that pass. The goal was never zero filter words. It was a style where every one of them is a choice instead of a reflex.